Electric rivet heater



April 21,, 1925. 1,534,122

W. S. JOHNSON ET AL.

ELECTRIC RIVET HEATER FiledFeb. 28, 1921 l/VVfNTORS. WZZZmm S. Johnson, and

Jbim Ml Shefier Patented Apr. 21, 1925.

I UNITED STATES WILLIAM S. JOHNSON AND JOHN,W. SHEFFER, OF BERWICK, PENNSYLVANIA; AS-

PATENT OFFICE? szcuons TO AMERICAN can AND rounnmr COMPANY, or six. LDUIS, mssounr, aooaronarrou or new JERSEY.

nLEcrnIo BZIVET HEATER.

Application filed February 28, 1921.

To all whom it may concern:

Be it known that WILLIAM S. JonNsoN and Joan 1V. SHEFFER, residing at Berwick, Columbia County, Pennsylvania, and being citizens of the United States, have invented certain new and useful Improvements in an Electric Rivet Heater, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and to use the same, reference being had to the accompanying drawings, which illustrate the preferred form of the invention, though it is to be understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that various modifications thereof within the scope of the claims will occur to persons skilled in the art.

In said drawings:

Figure 1 is a front elevation of'a portion of an electric rivetheater showing our improvement applied thereto;

Figure 2 is an elevation, partly in section,

' of a portion of the structure shown in Fig.

1 and Figure 3 is a side elevation, partly broken away. of the parts shown in Fig. 2.

It is an object of our invention to Provide an electric rivet heater having its secondary coil provided with electrodes adapted to be adjusted relatively to each other so as to accommodate rivets of different lengths and it is a further object of our invention to provide a simple and eflicient means whereby the electrodes may be quickly adjusted to provide the desired normal opening between the electrodes.

In the drawings, 1 designates the primary coil, 2 the secondary coil and 3 the separators interposed between the primary and secondary coils. The coils 1 and 2 and the separators 3 are mounted upon the upper portion of the rectangular laminated core 4 carried upon a suitable base (not shown) and held between pairs of members 6 and 7 which are held tightly against the core by the bolts 8, the members 6 being secured by bolts 8 to the members 7 which are, in turn, secured to the base.

Secured to members 6 by the bolts 8 is a U-shaped angle bar supporting member 9 that passes over the coils 1 and 2. The sup- Serial No. 448,313.

porting member 9 is secured to the members 6 so that, of the portion of the member 9 extending over the coils 1 and 2, one flange will be horizontal and project over the upper electrode 10 of the secondary coil 2 While the other flange will project downwardly from the horizontal flange as shown in Fig. 3.

The upper electrode 10 has a screw threaded opening 11 in \Thich is threaded a rod .12 having-a portion 13 threaded to engage in the opening 11 and the remainder of the rod provided with a screw thread 1410f a coarse pitch. The rod 12 projects through an opening in the horizontal flange 15 of the sup porting member 9 and is provided with the lock and adjusting nuts 16 and 17, adapted to engage the o posite faces of the horizontal flange 15. ivotallysecured to the nut 17 is an operating handle or wrench 18 comprising a handle 19 secured to a yoke 20, the sides of the yoke 20 extending on opposit-e sides of the nut 17 and being secured thereto by bolts 21 which are threaded into the sides of the yoke 20 and have cylindrical ends fitting into openings in the nut 17.

The lower electrode 22 of the secondary coil is operated by means of a rod 23 pivotally connected to an operating lever (not shown) at its lower end and by a bolt 25 to a lug 24 secured to the electrode 22 at its upper end.

gap between the electrodes 10 and 22 by loosening the nut 17 whereupon the nut 16 may be readily turned to its new position Without using a Wrench or other tool after which the electrode 10 is moved to its new position and locked in llace by tightening the nut 17.

Pivoting the wrench to the nut 17 prevents the wrench from becoming lost and permits of it being turned to a position opposite to that shown in Fig. 3 so as not to interfere with the operation of the machine.

' What we claim is:

1. An electric rivet heater having a secondary coil, a normally fixed upper elec trode on said coil, a support for said electrode, threaded meansco-nnccting said electrode and said support and means on said threaded means and engaging on opposite sides of said support adapted to adjust the The electrode 10 is adjusted to vary the position of said electrode with respect to said support and to lock said electrode in fixed position.

2. An electric rivet heater having a secondary coil, upper and lower electrodesfor said coil, a supporting member having an opening therein, a threaded member secured to said upper electrode and passing through said opening in said supporting member to suspend said upper electrode therefrom and means on said threaded member adapted to engage said supporting member to shift said electrode with respect to said supportlng member.

3. An electric rivet heater having a secondary coil, upper and lower electrodes for said coil, a supporting member having an opening therein, a threaded member secured to said upper electrode and passing through said opening in said supporting member to suspend said upper electrode therefrom, a nut on said threaded member in engagement with said supporting member, operating means for said nut pivotally connected thereto and means adapted to cooperate with said nut in looking said threaded mem her in fixed position.

4. An electric rivet heater having a secondary coil, upper and lower electrodes on said coil, a supporting member having an opening therein, a threaded member secured to said upper electrode and passing through said opening in said supporting member to suspend said upper electrode therefrom, means on said threaded member adapted-to engage said supporting member to shift said electrode with respect to said supporting member and means cooperating with said shifting means and said supportmg member to lock said threaded member in ing member and engaging on the opposite of said supporting member to lock said electrode in fixed position.

6. In an electric rivet heater, a secondary coil having a normally fixed upper electrode, a supporting member having an open ing therein, a threaded member secured to said upper electrode and passing through said opening in said supporting member to suspend said upper electrode therefrom and means on said threaded member and engaging on opposite sides of said supporting member to shift said electrode with respect to said supporting member and to lock said electrode in fixed position.

In witness whereof we have hereunto set our hands in the presence of two witnesses.

WILLIAM S. JOHNSON JOHN W. SHEFFER. Witnesses:

FRED A. HOFFMAN, HENRY F. TRAUGH. 

